Answer: 200 adult tickets.
Step-by-step explanation: 500 ÷ 2 = 250
250 - 50 = 200
if you are still confused i can go into further detail:
because there were 50 more student tickets sold that means you would divide the total # of tickets sold to get 250 then you would subtract 50 from the adult tickets because there were 50 more student tickets than adult tickets.